Yes, in addition to birds, the class of mammal known as Amniotes lay eggs that have amniotic structures, the yolk and white. This group includes reptiles, dinosaurs, mammals and birds. Fish and amphibians do not have whites or yolks in their eggs. These animals have eggs that are fertilized externally in water, with Fish being fertilized after the female lays them, and the amphibians being fertilized in water or in a protective foam.
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